﻿<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
     <el-header>
       <div>
         <img src="../assets/logo.png" alt="">
         <span>电商后台管理系统</span>
       </div>
       <el-button type="info" @click="loginout">退出</el-button>
     </el-header>
     <el-container>
        <!-- 侧边栏区域 -->
        <el-aside :width="isCollapse ? '64px' : '200px'">
          <div class="toggle-button" @click="toggleCollapse()">|||</div>
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409ffe"
            unique-opened
            :collapse = isCollapse
            :collapse-transition = "false"
            :router = "true"
            :default-active= "activePath"
            >
            <!-- 一级菜单 -->
            <!-- :index接受字符串不接受数字所以+ '' -->
            <el-submenu :index="item.id + ''" v-for="item in menuList"
            :key="item.id">
              <!-- 一级菜单的模板区域 -->
              <template slot="title">
                <i :class="iconsObj[item.id]"></i>
                <span>{{item.authName}}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="'/' + subItem.path + ''" v-for="subItem in item.children"
            :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                <template slot="title">
                  <i class="el-icon-menu"></i>
                  <span>{{subItem.authName}}</span>
              </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 主体区域 -->
        <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
        </el-main>
     </el-container>
   </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      // 一级自定义图标
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont  icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    loginout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单的数据
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // ||| 点击按钮切换菜单的折叠和展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container{
  height:100%;
}
.el-header{
  background-color:#373d41;
  display:flex;
  justify-content: space-between;
  padding-left:0;
  align-items:center;
  color:#ffffff;
  font-size:20px;
  >div{
    display:flex;
    align-items:center;
    img{
      width:60px;
      height:60px;
      border-radius: 50%;
    }
    span{
      margin-left:15px;
    }

  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right:none;
  }
}
.el-main{
  background-color: #eaedf1;
}
.iconfont{
  margin-right:10px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color:#fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor:pointer;
}
</style>
